MySQL自用脚本（不定期更新）

查询指定SQL的trace信息

mysql -uUSER -pPWD -hHOST -e "\
use ins_tc_prd; set session optimizer_trace=‘enabled=on‘; set optimizer_trace_max_mem_size = 1638400; explain SQL; select * from information_schema.optimizer_trace\G;" > trace_log.log

查看表空间的使用情况

select table_name,
       (data_length+ index_length) /1024/1024 as total_mb,
       table_rows
from information_schema.tables
where table_schema= ‘Database‘ ;//不写就是全部

查看MySQL数据库状态

mysqladmin -P3306 -uroot -p -h127.0.0.1 -r -i 1 extended-status |awk -F"|" "BEGIN{ count=0; }"‘{ if($2 ~ /Variable_name/ && ((++count)%20 == 1)){\
print "----------|---------|--- MySQL Command Status --|----- Innodb row operation -----|-- Buffer Pool Read --";\
print "---Time---|---QPS---|select insert update delete|  read  inserted updated deleted|   logical    physical";\
}\
else if ($2 ~ /Queries/){queries=$3;}\
else if ($2 ~ /Com_select /){com_select=$3;}\
else if ($2 ~ /Com_insert /){com_insert=$3;}\
else if ($2 ~ /Com_update /){com_update=$3;}\
else if ($2 ~ /Com_delete /){com_delete=$3;}\
else if ($2 ~ /Innodb_rows_read/){innodb_rows_read=$3;}\
else if ($2 ~ /Innodb_rows_deleted/){innodb_rows_deleted=$3;}\
else if ($2 ~ /Innodb_rows_inserted/){innodb_rows_inserted=$3;}\
else if ($2 ~ /Innodb_rows_updated/){innodb_rows_updated=$3;}\
else if ($2 ~ /Innodb_buffer_pool_read_requests/){innodb_lor=$3;}\
else if ($2 ~ /Innodb_buffer_pool_reads/){innodb_phr=$3;}\
else if ($2 ~ /Uptime / && count >= 2){\
printf(" %s |%9d",strftime("%H:%M:%S"),queries);\
printf("|%6d %6d %6d %6d",com_select,com_insert,com_update,com_delete);\
printf("|%8d %6d %7d %7d",innodb_rows_read,innodb_rows_inserted,innodb_rows_updated,innodb_rows_deleted);\
printf("|%10d %11d\n",innodb_lor,innodb_phr);\
}}‘;

转自

1. http://blog.itpub.net/29510932/viewspace-1812475/